If atom is mostly empty space, why don't we pass through things ?

 We know the atom is mostly empty space, with nucleus accounting for a very small portion of atom. Nucleus can be compared to like a grain of sand with atom as a large room. Then why don't we pass through things, how can we sit on a chair ... why do we bump onto things ?

• Things are held up even with the vast amount of emptiness in an atom only due to fact that electron cloud in outer space of atoms in me are negatively charged- > So do the electrons in the atoms of chair, they are also negatively charged

• We know negative charges repel each other -> And we also know electrical forces are very STRONG-> So we are able to Sit, Walk, Do things that we do, See things as we see

• Without Electrical forces-> Everything will crumble into fine dust -> There will be no matter or no things as we see in Universe -> Only Clouds of Protons, Neutrons, Electrons !